actual '='
quote '!'
level '>'
preamble
"
begintheindex
makeatletter
scan@allowedfalse"
postamble
"
endtheindex"
item_x1 "
efill
subitem "
item_x2 "
efill
subsubitem "
delim_0 "
pfill "
delim_1 "
pfill "
delim_2 "
pfill "
lethead_prefix "
bfseries
hfil "
lethead_suffix "
hfil
nopagebreak"
lethead_flag 1
heading_prefix "
bfseries
hfil "
heading_suffix "
hfil
nopagebreak"
headings_flag 1